Add a MaxProgress option (default: 100).

The MaxProgress option allows you to set the maximum number of ticks
that are within a progress bar. Each call to tick() increments the tick
count. The progress bar percentage is the number of ticks divided by the
MaxProgress option.

The default MaxProgress is 100, so each tick would be 1%.  If
MaxProgress is set to 500, for example, then each tick would be 0.2%.

samples/max_progress.cpp

@@ -0,0 +1,30 @@
+#include <chrono>
+#include <indicators/block_progress_bar.hpp>
+#include <indicators/cursor_control.hpp>
+#include <thread>
+
+int main() {
+
+  // Hide cursor
+  indicators::show_console_cursor(false);
+
+  indicators::BlockProgressBar bar{
+    indicators::option::BarWidth{80},
+    indicators::option::FontStyles{
+          std::vector<indicators::FontStyle>{indicators::FontStyle::bold}},
+    indicators::option::MaxProgress{400}
+  };
+
+  // Update bar state
+  while (true) {
+    bar.tick();
+    if (bar.is_completed())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(50));
+  }
+
+  // Show cursor
+  indicators::show_console_cursor(true);
+
+  return 0;
+}